python/samba/tests/auth_log_samlogon.py

   1 # Unix SMB/CIFS implementation.
   2 # Copyright (C) Andrew Bartlett <abartlet@samba.org> 2017
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 #
  17
  18 """
  19     Tests auth logging tests that exercise SamLogon
  20 """
  21
  22 from samba import auth
  23 import samba.tests
  24 from samba.messaging import Messaging
  25 from samba.dcerpc.messaging import MSG_AUTH_LOG, AUTH_EVENT_NAME
  26 import time
  27 import json
  28 import os
  29 from samba import smb
  30 from samba.samdb import SamDB
  31 import samba.tests.auth_log_base
  32 from samba.credentials import (
  33     Credentials,
  34     DONT_USE_KERBEROS,
  35     CLI_CRED_NTLMv2_AUTH
  36 )
  37 from samba.dcerpc import ntlmssp, netlogon
  38 from samba.ndr import ndr_pack
  39 from samba.auth import system_session
  40 from samba.tests import delete_force
  41 from samba.dsdb import UF_WORKSTATION_TRUST_ACCOUNT, UF_PASSWD_NOTREQD
  42 from samba.dcerpc.misc import SEC_CHAN_WKSTA
  43
  44 class AuthLogTestsSamLogon(samba.tests.auth_log_base.AuthLogTestBase):
  45
  46     def setUp(self):
  47         super(AuthLogTestsSamLogon, self).setUp()
  48         self.lp      = samba.tests.env_loadparm()
  49         self.creds   = Credentials()
  50
  51         self.session = system_session()
  52         self.ldb = SamDB(
  53             session_info=self.session,
  54             credentials=self.creds,
  55             lp=self.lp)
  56
  57         self.domain        = os.environ["DOMAIN"]
  58         self.netbios_name  = "SamLogonTest"
  59         self.machinepass   = "abcdefghij"
  60         self.remoteAddress = "/root/ncalrpc_as_system"
  61         self.base_dn       = self.ldb.domain_dn()
  62         self.samlogon_dn   = ("cn=%s,cn=users,%s" %
  63                               (self.netbios_name, self.base_dn))
  64
  65
  66     def tearDown(self):
  67         super(AuthLogTestsSamLogon , self).tearDown()
  68         delete_force(self.ldb, self.samlogon_dn)
  69
  70     def _test_samlogon(self, binding, creds, checkFunction):
  71
  72         def isLastExpectedMessage(msg):
  73             return (
  74                 msg["type"] == "Authentication" and
  75                 msg["Authentication"]["serviceDescription"]  == "SamLogon" and
  76                 msg["Authentication"]["authDescription"]     == "network" and
  77                 msg["Authentication"]["passwordType"]        == "NTLMv2")
  78
  79         if binding:
  80             binding = "[schannel,%s]" % binding
  81         else:
  82             binding = "[schannel]"
  83
  84         utf16pw = unicode(
  85             '"' + self.machinepass.encode('utf-8') + '"', 'utf-8'
  86         ).encode('utf-16-le')
  87         self.ldb.add({
  88             "dn": self.samlogon_dn,
  89             "objectclass": "computer",
  90             "sAMAccountName": "%s$" % self.netbios_name,
  91             "userAccountControl":
  92                 str(UF_WORKSTATION_TRUST_ACCOUNT | UF_PASSWD_NOTREQD),
  93             "unicodePwd": utf16pw})
  94
  95         machine_creds = Credentials()
  96         machine_creds.guess(self.get_loadparm())
  97         machine_creds.set_secure_channel_type(SEC_CHAN_WKSTA)
  98         machine_creds.set_password(self.machinepass)
  99         machine_creds.set_username(self.netbios_name + "$")
 100
 101         netlogon_conn = netlogon.netlogon("ncalrpc:%s" % binding,
 102                                           self.get_loadparm(),
 103                                           machine_creds)
 104         challenge = b"abcdefgh"
 105
 106         target_info = ntlmssp.AV_PAIR_LIST()
 107         target_info.count = 3
 108
 109         domainname = ntlmssp.AV_PAIR()
 110         domainname.AvId = ntlmssp.MsvAvNbDomainName
 111         domainname.Value = self.domain
 112
 113         computername = ntlmssp.AV_PAIR()
 114         computername.AvId = ntlmssp.MsvAvNbComputerName
 115         computername.Value = self.netbios_name
 116
 117         eol = ntlmssp.AV_PAIR()
 118         eol.AvId = ntlmssp.MsvAvEOL
 119         target_info.pair = [domainname, computername, eol]
 120
 121
 122         target_info_blob = ndr_pack(target_info)
 123
 124         response = creds.get_ntlm_response(flags=CLI_CRED_NTLMv2_AUTH,
 125                                            challenge=challenge,
 126                                            target_info=target_info_blob)
 127
 128         netr_flags = 0
 129
 130         logon_level = netlogon.NetlogonNetworkTransitiveInformation
 131         logon = samba.dcerpc.netlogon.netr_NetworkInfo()
 132
 133         logon.challenge = [ord(x) for x in challenge]
 134         logon.nt = netlogon.netr_ChallengeResponse()
 135         logon.nt.length = len(response["nt_response"])
 136         logon.nt.data = [ord(x) for x in response["nt_response"]]
 137         logon.identity_info = samba.dcerpc.netlogon.netr_IdentityInfo()
 138         (username, domain) = creds.get_ntlm_username_domain()
 139
 140         logon.identity_info.domain_name.string = domain
 141         logon.identity_info.account_name.string = username
 142         logon.identity_info.workstation.string = creds.get_workstation()
 143
 144         validation_level = samba.dcerpc.netlogon.NetlogonValidationSamInfo4
 145
 146
 147         result = netlogon_conn.netr_LogonSamLogonEx(os.environ["SERVER"],
 148                                                machine_creds.get_workstation(),
 149                                                logon_level, logon,
 150                                                validation_level, netr_flags)
 151
 152         (validation, authoritative, netr_flags_out) = result
 153
 154
 155         messages = self.waitForMessages(isLastExpectedMessage)
 156         checkFunction(messages)
 157
 158     def samlogon_check(self, messages):
 159
 160         expected_messages = 5
 161         self.assertEquals(expected_messages,
 162                           len(messages),
 163                           "Did not receive the expected number of messages")
 164
 165         # Check the first message it should be an Authorization
 166         msg = messages[0]
 167         self.assertEquals("Authorization", msg["type"])
 168         self.assertEquals("DCE/RPC",
 169                           msg["Authorization"]["serviceDescription"])
 170         self.assertEquals("ncalrpc", msg["Authorization"]["authType"])
 171         self.assertEquals("NONE", msg["Authorization"]["transportProtection"])
 172
 173
 174     def test_ncalrpc_samlogon(self):
 175
 176         creds = self.insta_creds(template=self.get_credentials(),
 177                                  kerberos_state=DONT_USE_KERBEROS)
 178         try:
 179             self._test_samlogon("SEAL", creds, self.samlogon_check)
 180         except Exception as e:
 181             self.fail("Unexpected exception: " + str(e))